FIELD: chemistry.
SUBSTANCE: invention relates to production of building materials based on phosphogypsum binder. The crude mixture for making gypsum brick contains, wt %: phosphogypsum binder 48-52; quartz sand 6-10; carbonate sand 11-14; urea-formaldehyde resin 2-3; water 28-32.
EFFECT: high strength of gypsum brick.
1 tbl
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